import java.lang.annotation.ElementType;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Annotation;
import java.lang.annotation.Inherited;
import java.lang.annotation.Native;
import java.lang.annotation.Documented;
import java.lang.annotation.Repeatable;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
import java.lang.annotation.AnnotationFormatError;
import java.lang.annotation.AnnotationTypeMismatchException;
import java.lang.annotation.IncompleteAnnotationException;
public class BasicKnowledge {
    /**
     * 元注解:系统内置注解,又称注解的注解,位于java.lang.annotation包下面的注解
     *     @Target
     *     @Retention
     *     @Documented
     *     @Inherited
     *     @Repeatable
     * 注解不支持继承
     * */
}
